Sofa



FIG. 1 is a front perspective view of a preferred embodiment of the invention.

FIG. 2 is a front view of the embodiment of FIG. 1.

FIG. 3 is a side view of the embodiment of FIG. 1.

FIG. 4 is a back view of the embodiment of FIG. 1; and,

FIG. 5 is a top view of the embodiment of FIG. 1. 

The ornamental design for a sofa, substantially as shown and described. 